<template>
  <view>
    <view class="search-box">
      <!-- 基本用法 -->
      <uni-search-bar :radius="100" @confirm="search" @input="input" clearButton='auto' cancelButton='none'></uni-search-bar>
    </view>
    <!-- 搜索建议列表 -->
    <view class="sugg-list" v-if="srarchList.length !== 0">
      <view @click="gotoDetail(item)" class="sugg-item" v-for="(item, i) in srarchList" :key='i'>
        <view class="goodsname">{{item.goods_name}}</view>
        <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
    <!-- 搜索历史区域 -->
    <view class="history-box" v-else>
      <!-- 标题区域 -->
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="17" @click="clean"></uni-icons>
      </view>
      <!-- 列表区域 -->
      <view class="history-list">
        <uni-tag @click="gotoGoodsList(item)" :text="item" v-for="(item, i) in historyList " :key='i'></uni-tag>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        timer: null,
        // 输入内容
       kw: '',
       srarchList:[],
       // 搜索历史数据
       historyList: []
      };
    },
    onLoad() {
      this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
    },
    methods: {
      input (e) {
        clearTimeout(this.timer)
        this.timer = setTimeout(() => {
          this.kw = e
          this.getSearchList()
        }, 500)
      },
     async getSearchList () {
       // 判断搜索关键字是否为空
       if (this.kw.length === 0) {
         this.srarchList = []
         return
       }
        const{ data: res } = await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.kw })
        if (res.meta.status !== 200) return uni.$showMsg()
        this.srarchList = res.message
        // 将搜索关键词存储到列表
        this.saveSearchHistory()
      },
      gotoDetail (item) {
        uni.navigateTo({
          url:'/subpkgs/goods_detail/goods_detail?goods_id=' + item.goods_id
        })
      },
      saveSearchHistory () {
        // 搜索历史记录不能有重复的
        const index = this.historyList.indexOf(this.kw)
        console.log(index)
        if (index !== -1) {
          this.historyList.splice(index, 1)
        }
        this.historyList.unshift(this.kw)
        // 数据持久化
        uni.setStorageSync('kw', JSON.stringify(this.historyList))
      },
      clean () {
        this.historyList = []
        uni.setStorageSync('kw', '[]')
      },
      gotoGoodsList (kw) {
        console.log(kw)
        uni.navigateTo({
          url:'/subpkgs/goods_list/goods_list?query=' + kw
        })
      }
    }
  }
</script>

<style lang="scss">
.search-box {
  position: sticky;
  top: 0;
  z-index: 3
}
.uni-searchbar {
  background-color: #C00000
}
.sugg-list {
  padding: 0 5px;

  .sugg-item {
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    display: flex;
    align-items: center;
    justify-content: space-between;

    .goods-name {
      // 文字不允许换行（单行文本）
      white-space: nowrap;
      // 溢出部分隐藏
      overflow: hidden;
      // 文本溢出后，使用 ... 代替
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}
.history-box {
  padding: 0 5px;

  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }

  .history-list {
    display: flex;
    flex-wrap: wrap;

    .uni-tag {
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
